Add Pike release

Pike release schedule is taken from
https://review.openstack.org/#/c/425254/3/doc/source/pike/schedule.yaml

Change-Id: Ifd0fe64d289462a1d337bd9510bf39aec399c200

etc/default_data.json

@@ -27674,13 +27674,23 @@
             "refs": {
                 "governance": {
                     "type": "big_tent",
-                    "source": "https://git.openstack.org/cgit/openstack/governance/plain/reference/projects.yaml"
+                    "source": "https://git.openstack.org/cgit/openstack/governance/plain/reference/projects.yaml?id=sept-2016-elections"
                 }
             }
         },
         {
             "release_name": "Ocata",
             "end_date": "2017-Feb-23",
+            "refs": {
+                "governance": {
+                    "type": "big_tent",
+                    "source": "https://git.openstack.org/cgit/openstack/governance/plain/reference/projects.yaml?id=jan-2017-elections"
+                }
+            }
+        },
+        {
+            "release_name": "Pike",
+            "end_date": "2017-Aug-31",
             "refs": {
                 "governance": {
                     "type": "big_tent",

etc/test_default_data.json

@@ -279,6 +279,16 @@
                     "source": "https://git.openstack.org/cgit/openstack/governance/plain/reference/projects.yaml"
                 }
             }
+        },
+        {
+            "release_name": "Pike",
+            "end_date": "2017-Aug-31",
+            "refs": {
+                "governance": {
+                    "type": "big_tent",
+                    "source": "https://git.openstack.org/cgit/openstack/governance/plain/reference/projects.yaml"
+                }
+            }
         }
     ],